/*
   FieldVis - A Tool for Visualizing Astrophysical Magnetohydrodynamic Flow
   
   Copyright (C) 2006 - 2008     FieldVis Development Team
  
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
  
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
  
   You should have received a copy of the GNU General Public License along
   with this program; if not, write to the Free Software Foundation, Inc.,
   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

   File        : SelectionPlane.cpp
   Author      : Jeremy Moc  (mocj@msi.umn.edu)

   Description : Container for the selection plane shown in the client window.
*/

#include <GL/gl.h>

#include "SelectionPlane.h"


void SelectionPlane::CycleDrawState()
{
   switch (state_)
   {
      case NONE:
         state_ = YZ;
         break;

      case YZ:
         state_ = XZ;
         break;

      case XZ:
         state_ = XY;
         break;

      case XY:
      default:
         state_ = NONE;
         break;
   }
}

void SelectionPlane::Draw(const Point &cube)
{
   glPushAttrib(GL_ENABLE_BIT);
   glDisable(GL_LIGHTING);
   glDisable(GL_TEXTURE_2D);

   switch (state_)
   {
      case YZ:
         glColor4f(1.0f, 1.0f, 1.0f, 0.1f);
         glBegin(GL_QUADS);
         glVertex3f(cube.GetX(), 0.0f, 0.0f);
         glVertex3f(cube.GetX(), 0.0f, z_);
         glVertex3f(cube.GetX(), y_, z_);
         glVertex3f(cube.GetX(), y_, 0.0f);
         glEnd();
         glColor4f(1.0f, 0.0f, 0.0f, 1.0f);
         glBegin(GL_LINE_LOOP);
         glVertex3f(cube.GetX(), 0.0f, 0.0f);
         glVertex3f(cube.GetX(), 0.0f, z_);
         glVertex3f(cube.GetX(), y_, z_);
         glVertex3f(cube.GetX(), y_, 0.0f);
         glEnd();
         break;

      case XZ:
         glColor4f(1.0f, 1.0f, 1.0f, 0.1f);
         glBegin(GL_QUADS);
         glVertex3f(0.0f, cube.GetY(), 0.0f);
         glVertex3f(0.0f, cube.GetY(), z_);
         glVertex3f(x_, cube.GetY(), z_);
         glVertex3f(x_, cube.GetY(), 0.0f);
         glEnd();
         glColor4f(0.0f, 1.0f, 0.0f, 1.0f);
         glBegin(GL_LINE_LOOP);
         glVertex3f(0.0f, cube.GetY(), 0.0f);
         glVertex3f(0.0f, cube.GetY(), z_);
         glVertex3f(x_, cube.GetY(), z_);
         glVertex3f(x_, cube.GetY(), 0.0f);
         glEnd();
         break;

      case XY:
         glColor4f(1.0f, 1.0f, 1.0f, 0.1f);
         glBegin(GL_QUADS);
         glVertex3f(0.0f, 0.0f, cube.GetZ());
         glVertex3f(0.0f, y_, cube.GetZ());
         glVertex3f(x_, y_, cube.GetZ());
         glVertex3f(x_, 0.0f, cube.GetZ());
         glEnd();
         glColor4f(0.0f, 0.0f, 1.0f, 1.0f);
         glBegin(GL_LINE_LOOP);
         glVertex3f(0.0f, 0.0f, cube.GetZ());
         glVertex3f(0.0f, y_, cube.GetZ());
         glVertex3f(x_, y_, cube.GetZ());
         glVertex3f(x_, 0.0f, cube.GetZ());
         glEnd();
         break;

      default:
         break;
   }
   
   glPopAttrib();
}

